CN117275874A - Magnetizing device for internal and external circular monopole radiation magnetic ring - Google Patents

Abstract

The utility model discloses a magnetizing device for an inner and outer circular monopole radiation magnetic ring, and belongs to the technical field of permanent magnet material magnetizing. The device comprises an outer ring clamp and an inner ring clamp arranged in an inner cavity of the outer ring clamp, wherein a placement area for placing a magnetic ring to be magnetized is reserved between the inner ring clamp and the outer ring clamp; the inner ring clamp and the outer ring clamp comprise a plurality of iron cores and magnetizing coils wound on the iron cores, the winding rules of the magnetizing coils are implemented according to the right-hand spiral rule, and the winding directions of the magnetizing coils of the inner ring clamp and the outer ring clamp are consistent and are arranged in series. When the pulse electricity excites the magnetic field, a radiation magnetic field with N/S consistent along the radial direction is formed in the placement area, so that the magnetic ring can be saturated and magnetized, and the magnetic performance of the magnetic ring can be optimized.

Description

Magnetizing device for internal and external circular monopole radiation magnetic ring

Technical Field

The utility model belongs to the technical field of permanent magnet material magnetizing, and particularly relates to an inside and outside circular monopole radiation magnetic ring magnetizing device.

Background

Under the current situation, the magnetizing schemes of the internal and external circular monopole radiation magnetic ring of the permanent magnet material mainly comprise two kinds: the principle of the magnetizing method is that a DC electromagnet is adopted to magnetize, and the electromagnet and an additional iron block form a closed loop through constant-current DC in a coil. The coil generates a constant magnetic field, so that exciting current flows to generate a magnetic field. And placing the magnetic ring to be magnetized into the magnetizing magnetic field to realize the magnetization of the magnetic ring. The problems of this solution are: 1. the magnetizing saturation of the magnetic ring product is insufficient due to low magnetizing magnetic field, namely the magnetic performance cannot be optimized; 2. continuous operation has serious heat generation, and has disqualification of magnetization performance with a small proportion (generally 1% -3%).

The other is to form a ring radial magnetic circuit space by adopting the design of a permanent magnet circuit, and then to-be-magnetized magnetic ring is placed into the magnetic field space for magnetization and magnetization. The intensity of the magnetizing magnetic field is weaker than that of the first type, and the magnetizing magnetic field can only magnetize a permanent magnetic ring with lower coercivity, such as a magnetic ring made of ferrite, alnico and other materials.

Through searching, the application with the Chinese patent publication number of CN 217655718U discloses a magnetizing device for a magnetic ring. The application comprises two oppositely arranged magnetizing parts, wherein iron cores and coils which are surrounded into a ring shape are arranged near each other of the two magnetizing parts, the ring structure formed by the coils is identical to the ring structure formed by a magnetic ring workpiece to be magnetized, at least three coils sleeved inside and outside are arranged on one iron core, at least one coil is arranged on the other iron core, the coils are coaxially arranged, and a magnetic ring placing space is arranged between the coils of the two magnetizing parts; when the coils are electrified, the electrified current directions of the two adjacent coils are opposite; when the magnetic ring workpiece to be magnetized is positioned in the magnetic ring placing space, the middle parts of the end faces of the two sides of the magnetic ring workpiece to be magnetized are provided with a coil. This application has the advantage that can make the terminal surface magnetic field intensity of the magnetic ring of moulding plastics after magnetizing bigger.

For another example, chinese patent publication No. CN 219040173U discloses a magnetizing coil with wires unevenly arranged. The application comprises an iron core, wherein a plurality of coils and a few-turn coil are embedded in an embedding slot of the iron core at proper intervals and unevenly, wires of all magnetizing coils are connected in series, and the multi-turn coil is used for reinforcing magnetization of a workpiece; the coil with fewer turns is mainly used for connecting the coil circuits, so that the polarities of the rotors are corresponding. The utility model correspondingly designs the magnetizing coils differently according to the structure of a specific workpiece to be magnetized, particularly, different turns are arranged at different positions, a plurality of turns of coils and a few turns of coils are properly embedded in the wire embedding groove of the iron core at intervals, so that main contradiction is grasped, and the magnetizing efficiency is improved; can meet various different requirements; under the condition of meeting the magnetizing requirement, the current of the lead is as small as possible, so that the service life of the magnetizing coil is prolonged; and the gap is magnetized for multiple times, and finally, the magnetic performance requirement of the whole rotor is met.

The above two related documents are not solved effectively for the problem of low magnetizing field.

Disclosure of Invention

1. Problems to be solved

Aiming at least some problems existing in the prior art, the utility model provides an inside and outside circular monopole radiation magnetic ring magnetizing device, which aims to solve the problems that the existing magnetic ring magnetizing device is low in magnetizing magnetic field, so that the magnetizing saturation of a magnetic ring product is insufficient, and the optimal magnetic performance of the magnetic ring product cannot be achieved.

2. Technical proposal

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model relates to a magnetizing device for an inner and outer circular monopole radiation magnetic ring, which comprises an outer ring clamp and an inner ring clamp arranged in an inner cavity of the outer ring clamp, wherein a placement area for placing a magnetic ring to be magnetized is reserved between the inner ring clamp and the outer ring clamp; the inner ring clamp and the outer ring clamp comprise a plurality of iron cores and magnetizing coils wound on the iron cores, and when a pulse electricity excites a magnetic field, N/S radial direction consistent radiation magnetic fields are formed in a placement area.

Further, the winding rule of the magnetizing coils is implemented according to a right-hand spiral rule, wherein the winding directions of the magnetizing coils of the inner ring clamp and the outer ring clamp are consistent, and the magnetizing coils are arranged in series.

Further, the iron cores of the inner ring clamp and the outer ring clamp are distributed in a staggered mode.

Further, the iron core is of a T-shaped structure, the wing parts of the inner T-shaped iron core and the outer T-shaped iron core are oppositely arranged, and the wing parts of the T-shaped iron cores of the clamps are mutually connected to form a whole ring.

Further, the number of the iron cores of the inner ring clamp and the outer ring clamp is 5, and magnetizing coils on the respective iron cores are wound clockwise.

Further, the number of turns of the magnetizing coil is 3-12, and the diameter is 1-3.5 mm.

Further, the width of the placement area is 0.03-0.10 mm larger than the width of the magnetic ring to be magnetized.

Further, the device also comprises a pulse power supply, wherein the pulse power supply is provided with a 3500 micro-farad capacitor and an adjustable magnetizing voltage switch, and the range of the pulse power supply is 100V-1200V.

Further, the inner part and the outer ring clamp are respectively provided with a circular water channel.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) The utility model relates to a magnetizing device for an inner circular monopole radiating magnetic ring, wherein an inner ring clamp and an outer ring clamp respectively comprise a plurality of iron cores and magnetizing coils wound on the iron cores, and a magnetic ring to be magnetized is placed in a placement area between the inner ring clamp and the outer ring clamp; when the pulsed electric excitation magnetic field, a radiation magnetic field is formed in the placement area; because the current intensity of the pulse electricity in the coil is thousands to Mo Anpei, a high-intensity magnetic field higher than 0.8T-3T can be generated according to the right-hand spiral rule, so that the magnetizing intensity in the placement area is far higher than that of the traditional magnetizing magnetic field, and the magnetic ring can be saturated and magnetized, and the magnetic performance of the magnetic ring can be optimized.

(2) According to the magnetizing device for the inner and outer circular monopole radiating magnetic ring, the winding rule of the magnetizing coils is implemented according to the right-hand spiral rule, wherein the winding directions of the magnetizing coils of the inner and outer ring clamps are consistent, and the magnetizing coils are arranged in series, so that N/S radiating magnetic fields consistent in radial directions are formed in a placement area.

(3) According to the magnetizing device for the inner and outer circular monopole radiating magnetic rings, the iron cores of the inner and outer ring clamps are distributed in a staggered manner, so that the circumferential magnetizing uniformity of the magnetic rings to be magnetized can be guaranteed; meanwhile, the iron core is of a T-shaped structure, the wing parts of the inner T-shaped iron core and the outer T-shaped iron core are oppositely arranged, and the wing parts of the T-shaped iron cores of the clamps are mutually connected to form a whole ring, so that the placement area is changed into an annular area with two closed sides, and the magnetic field uniformity in the annular area is better.

Drawings

FIG. 1 is a schematic diagram of the whole structure of an inside and outside circular monopole radiation magnetic ring magnetizing device;

FIG. 2 is a schematic illustration of the magnetic field effect within a placement region in accordance with the present utility model;

FIG. 3 is a schematic diagram showing the effect of the magnetic ring after magnetizing;

fig. 4 is a schematic diagram of a winding of the magnetizing coil of the present utility model.

In the figure: 1. an outer ring clamp; 11. an iron core; 12. magnetizing coils; 2. an inner ring clamp; 3. and (5) magnetizing the magnetic ring.

Detailed Description

The utility model is further described below in connection with specific embodiments.

Example 1

As shown in fig. 1, the magnetizing device for the inside and outside circular monopole radiation magnetic ring of the embodiment comprises an outer ring clamp 1 and an inner ring clamp 2. The inner ring clamp 2 is positioned in the inner cavity of the outer ring clamp 1, and a placement area for placing the magnetic ring 3 to be magnetized is reserved between the inner ring clamp and the outer ring clamp.

The outer ring clamp 1 and the inner ring clamp 2 have basically the same structure, and each outer ring clamp comprises an iron core 11 distributed in a ring shape and magnetizing coils 12 wound on the iron core 11. When the pulse electricity excites the magnetic field, a radiation magnetic field with N/S consistent along the radial direction (N-S or S-N from inside to outside) can be formed in the placement area for carrying out the magnetizing operation on the magnetic ring 3 to be magnetized.

For convenience of the following description, the iron core 11 and the magnetizing coil 12 of the outer ring clamp 1 are an outer iron core and an outer coil, respectively; the iron core 11 and the magnetizing coil 12 of the inner ring clamp 2 are an inner iron core and an inner coil, respectively.

Specifically, the iron core 11 adopts electrical pure iron or silicon steel with good magnetic conductivity as the iron core, the magnetic conductivity is 10000-30000, and the uniformity of the generated magnetic field is good.

The magnetizing coil 12 is a copper yarn covered wire winding, preferably with the density of 8-9g/cm ³ Is an industrial pure copper. The number of turns of the magnetizing coil 12 is 3-12, and the diameter is 1-3.5 mm (flat wires with the cross section size of 1-2-4 mm can be used). The industrial pure copper has low resistivity and low price, and the coil manufactured into the proper ampere-turns can generate less heat in the working process than other materials (such as aluminum), so that the long-term stability of a magnetic field can be ensured in the long-term magnetizing work.

In the magnetizing device of the inner and outer circular monopole radiating magnetic ring of the embodiment, the winding rule of the magnetizing coil 12 is implemented according to the right-hand spiral rule. With the design shown in fig. 1, the inner and outer coils are designed in 5 ways, and the observation direction is determined to be from the outer circle to the center of the circle.

If the winding direction of the outer coil is clockwise (the current is clockwise in the viewing direction); the inner coil winding direction is also clockwise and a total of 10 coils are all connected in series to ensure that the magnetic field N/S is consistent in the radial direction. The specific series arrangement of coils can be seen in fig. 4.

Referring to fig. 2, when the pulsed electric excitation magnetic field is applied, the cavity magnetic field in the magnetic ring placement area can be a radiation magnetic field with an outer circular N pole and an inner circular S pole. When the magnetic ring 3 to be magnetized is placed in the cavity of the placement area and pulse current is excited, the magnetic ring 3 to be magnetized can be saturated magnetized. After magnetizing, the outer circle of the magnetic ring displays an S pole, and the inner circle displays an N pole. The magnetic ring can be magnetized into the state of an inner circular S pole and an outer circular N pole (as shown in figure 3) by changing the current direction or changing the winding direction of the coil from clockwise to anticlockwise.

Of course, an inside-outside monopole radiating magnetic ring magnetizing apparatus of this embodiment needs to be equipped with a pulse power supply. In the embodiment, the pulse power supply is equipped with 3500 micro-farad capacitor and adjustable magnetizing voltage switch, and the range is 100V-1200V.

The magnetizing device of the inner and outer circular monopole radiating magnetic ring is based on the principle that a magnetizing magnetic field is formed by a right-hand spiral rule of an electrified solenoid. The pulse current of 0.8 KA-30 KA triggered by the capacitor short circuit passes through the coil, and a magnetizing field of 0.8T-3T is instantaneously generated by Faraday electromagnetic induction law, namely the source of the high magnetizing field.

Compared with the current industry which adopts a permanent magnet magnetic field or a direct current magnetic field, the magnetic field strength is 0.4-1.0T. The magnetizing magnetic field generated by the magnetizing device of the embodiment is obviously improved, so that the magnetic ring can be saturated and magnetized, and the magnetic performance of the magnetic ring can be optimized.

In addition, according to the above method, various magnetic materials such as neodymium iron boron, ferrite and the like and radiation rings of different sizes are magnetized. According to the magnetizing performance requirement of the magnetic ring, the magnetizing clamp is also designed with different magnetizing coil numbers, and the magnetizing coil winding modes are implemented by clockwise winding along the observing direction. Meanwhile, the magnetizing mode of the embodiment is compared with the traditional direct current magnetic field magnetizing mode (see table one and table two).

Table one, pulse magnetizing mode magnetizing data

Second meter, DC magnetizing data

From the above table, compared with the traditional direct current magnetic field magnetizing mode, the pulse magnetizing mode of the embodiment is obviously superior to the direct current value in pulse current, so that the surface magnetism is obviously improved by 8-15%, the magnetic material performance is better developed, and a better selection scheme is provided for motor end application.

Example 2

To further ensure the magnetizing effect of the magnetic ring 3 to be magnetized. The present embodiment further improves the specific arrangement and structure of the core 11.

Specifically, referring to fig. 1, the inner iron core and the outer iron core are arranged in a staggered manner, so that the uniformity of the radiation magnetic field in the placement area is better, and the magnetizing uniformity of the magnetic ring is ensured.

Further, the iron core 11 is a T-shaped iron core, and the T-shaped iron core includes an abdomen and wings. The magnetizing coils 12 are wound on the abdomen of each T-shaped iron core; the wing parts of the inner T-shaped iron core and the outer T-shaped iron core are oppositely arranged, and the two ends of the wing parts of the T-shaped iron core are as long as possible, so that the distance between the adjacent wing parts on the same ring is as small as possible. Preferably, the ends of adjacent wings on the same ring are connected to each other such that the T-shaped core wings in the same fixture form a whole.

That is, the inner ring of the outer ring clamp 1 and the outer ring of the inner ring clamp 2 each form a complete ring, so that the placement area becomes an annular area with both sides closed, and thus the magnetic field uniformity is better.

In addition, the width of the placement area is 0.03-0.10 mm larger than the width of the magnetic ring 3 to be magnetized. The design ensures that the magnetic ring 3 to be magnetized can be smoothly placed in the placement area; on the other hand, the width of the placement area is prevented from being too large, and the magnetizing effect is influenced.

It should be noted that the width of the placement area refers to the distance between the outer ring formed by the wing portion of the inner T-shaped core and the inner ring formed by the wing portion of the outer T-shaped core; the width of the magnetic ring 3 to be magnetized refers to the distance between the inner ring and the outer ring of the magnetic ring.

Of course, the magnetizing effect is affected in order to prevent the device from generating heat during operation. The inner ring clamp and the outer ring clamp are respectively provided with an annular water channel, and cooling water/oil can be adopted for cooling when the clamps work. It is noted that the circulation pipeline may be in the prior art, and will not be described herein.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (9)

1. An inside and outside circle monopole radiation magnetic ring magnetizing device which is characterized in that: the device comprises an outer ring clamp (1) and an inner ring clamp (2) arranged in an inner cavity of the outer ring clamp (1), wherein a placement area for placing a magnetic ring (3) to be magnetized is reserved between the inner ring clamp and the outer ring clamp; the inner ring clamp and the outer ring clamp comprise a plurality of iron cores (11) and magnetizing coils (12) wound on the iron cores (11), and when a pulse electricity excites a magnetic field, N/S radial direction consistent radiation magnetic fields are formed in a placement area.

2. The magnetizing apparatus of claim 1, wherein: the winding rule of the magnetizing coils (12) is implemented according to a right-hand spiral rule, wherein the winding directions of the magnetizing coils (12) of the inner ring clamp and the outer ring clamp are consistent, and the magnetizing coils are arranged in series.

3. The magnetizing device for the inside and outside circular monopole radiating magnetic ring according to claim 2, wherein: the iron cores (11) of the inner ring clamp and the outer ring clamp are distributed in a staggered mode.

4. A magnetizing apparatus of an inside and outside monopole radiating magnetic ring according to claim 3, wherein: the iron core (11) is of a T-shaped structure, the wing parts of the inner T-shaped iron core and the outer T-shaped iron core are oppositely arranged, and the wing parts of the T-shaped iron cores of the clamps are mutually connected to form a whole ring.

5. The magnetizing apparatus of claim 4, wherein: 5 iron cores (11) of the inner ring clamp and the outer ring clamp are respectively arranged, and magnetizing coils (12) on the respective iron cores (11) are wound clockwise.

6. An inside and outside circle monopole radiating magnetic ring magnetizing apparatus as claimed in any one of claims 1 to 5, wherein: the number of turns of the magnetizing coil (12) is 3-12, and the diameter is 1-3.5 mm.

7. The magnetizing apparatus of claim 6, wherein: the width of the placement area is 0.03-0.10 mm larger than the width of the magnetic ring (3) to be magnetized.

8. The magnetizing apparatus of claim 7, wherein: the pulse power supply is provided with 3500 microfarad capacitors and an adjustable magnetizing voltage switch, and the range of the pulse power supply is 100V-1200V.

9. The magnetizing apparatus of claim 8, wherein: and annular water channels are arranged in the inner ring clamp and the outer ring clamp.